I2C transfer were using dynamic stack allocation. Get rid of it.
Signed-off-by: Antti Palosaari <crope@xxxxxx>
---
drivers/media/dvb-frontends/m88ds3103.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/media/dvb-frontends/m88ds3103.c b/drivers/media/dvb-frontends/m88ds3103.c
index fe4a67e..99eccca 100644
--- a/drivers/media/dvb-frontends/m88ds3103.c
+++ b/drivers/media/dvb-frontends/m88ds3103.c
@@ -26,17 +26,22 @@ static struct dvb_frontend_ops m88ds3103_ops;
static int m88ds3103_wr_regs(struct m88ds3103_priv *priv,
u8 reg, const u8 *val, int len)
{
+#define MAX_WR_LEN 32
+#define MAX_WR_XFER_LEN (MAX_WR_LEN + 1)
int ret;
- u8 buf[1 + len];
+ u8 buf[MAX_WR_XFER_LEN];
struct i2c_msg msg[1] = {
{
.addr = priv->cfg->i2c_addr,
.flags = 0,
- .len = sizeof(buf),
+ .len = 1 + len,
.buf = buf,
}
};
+ if (WARN_ON(len > MAX_WR_LEN))
+ return -EINVAL;
+
buf[0] = reg;
memcpy(&buf[1], val, len);
@@ -59,8 +64,10 @@ static int m88ds3103_wr_regs(struct m88ds3103_priv *priv,
static int m88ds3103_rd_regs(struct m88ds3103_priv *priv,
u8 reg, u8 *val, int len)
{
+#define MAX_RD_LEN 3
+#define MAX_RD_XFER_LEN (MAX_RD_LEN)
int ret;
- u8 buf[len];
+ u8 buf[MAX_RD_XFER_LEN];
struct i2c_msg msg[2] = {
{
.addr = priv->cfg->i2c_addr,
@@ -70,11 +77,14 @@ static int m88ds3103_rd_regs(struct m88ds3103_priv *priv,
}, {
.addr = priv->cfg->i2c_addr,
.flags = I2C_M_RD,
- .len = sizeof(buf),
+ .len = len,
.buf = buf,
}
};
+ if (WARN_ON(len > MAX_RD_LEN))
+ return -EINVAL;
+
mutex_lock(&priv->i2c_mutex);
ret = i2c_transfer(priv->i2c, msg, 2);
mutex_unlock(&priv->i2c_mutex);
--
1.8.4.2
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